[CMake] FIND_PATH issue in FindQt4.cmake

[Clinton Stimpson]

This might need some deeper looking into.  If you could file a bug report, that 
would be nice.

Clint

On Wednesday, February 16, 2011 09:15:25 am Harinarayan Krishnan wrote:
> Hi All,
> 
> Any thoughts on this subject? or should I file a bug report and see what
> happens?
> 
> Thanks,
> Hari
> 
> On Tue, Feb 15, 2011 at 10:59 AM, Harinarayan Krishnan 
<hkrishnan at lbl.gov>wrote:
> > Hi All,
> > 
> > I reran my code using cmake 2.8.4rc and still get the same issue where
> > FIND_PATH is picking the system directory for QT_CORE over my install
> > directory passed through HINTS ${qt_headers}. If this is not related to
> > CMAKE_FIND_FRAMEWORK should I file a bug report on this?
> > 
> > Thanks,
> > Hari
> > 
> > On Tue, Feb 15, 2011 at 10:23 AM, Andreas Pakulat <apaku at gmx.de> wrote:
> >> On 15.02.11 06:34:07, Harinarayan Krishnan wrote:
> >> > Hi All,
> >> > 
> >> > Thanks for the help so far, I will check and see if CMake 2.8.4rc has
> >> 
> >> the
> >> 
> >> > same issue meanwhile I noticed that FIND_PATH seems to have special
> >> > instructions for Darwin machines with the use of CMAKE_FIND_FRAMEWORK
> >> > on page
> >> 
> >> http://www.cmake.org/cmake/help/cmake-2-8-docs.html#command:find_path
> >> 
> >> > The notes are a little confusing: it says CMAKE_FIND_FRAMEWORK
> >> > defaults
> >> 
> >> to
> >> 
> >> > "FIRST" on Darwin systems which I can interpret one of two ways.
> >> > 
> >> > First, If a standard library and a framework are found in the same
> >> 
> >> search
> >> 
> >> > order then CMAKE will use this variable to determine which to pick
> >> 
> >> first.
> >> 
> >> > Second, if a framework is found regardless of where it is in the
> >> > search order it will be picked. I suspect the choice is the first
> >> > one. However,
> >> 
> >> in
> >> 
> >> > my test I found that if I set CMAKE_FIND_FRAMEWORK to be "LAST" then
> >> 
> >> CMAKE
> >> 
> >> > picks the proper path. This would make me think the second option is
> >> > at
> >> 
> >> play
> >> 
> >> > or it is just pure coincidence that this option happened to give me
> >> > the correct result.
> >> > 
> >> > Any of you know what the correct option is? To me it would make sense
> >> 
> >> that
> >> 
> >> > FIND_PATH honors the search order which would mean that the HINTS
> >> > option
> >> 
> >> in
> >> 
> >> > FindQt4 should have higher precedence than the Framework in the
> >> > CMAKE_SYSTEM_FRAMEWORK_PATH.
> >> 
> >> This cannot be answered without looking at the source code (as its not
> >> documented properly) to check what exactly the algorithm does. That is
> >> wether it iterates of the individual path in each of the steps and then
> >> checks for framework and afterwards for standard headers in that path or
> >> if it first checks all paths in a step for frameworks and then again
> >> checks all paths for standard headers. Depending on which of the two it
> >> is, the outcome of a find_path may depend on the order of the input
> >> path-variables (like CMAKE_PREFIX_PATH) or not.
> >> 
> >> Andreas
> >> 
> >> --
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